Brake head wear receiving element



8, 193. v, RT

BRAKE HEADWEAR RECEIVING ELEMENT Filed Dec. 16, 1932 2 Sheets-Sheet l Winesse ZJTMSW arch 8 1938.

V. H. HARBERT BRAKE HEADWEAR RECEIVING ELEMENT Filed Dec. 16, 1952 2Sheets-Sheet 2 Inmfentor Patented Mar. 8, 1938 UNITED" STATS T OFFIQEBRAKE HEAD WEAR RECEIVING ELEMENT Application December 16, 1932, SerialNo. 647,579

13 Claims.

My invention relates to means adapted to be applied to the standard typeof brake heads, whereby the wear which is encountered by the shoesupporting lug of the headwill all be taken care of or absorbed by myimproved wear receiving element made of metal best adapted for suchpurpose.

My invention contemplates means which may be easily applied to abrake-head and which at the same time can be removed and replaced shouldoccasion require; the element involving integral portions whereby theelement will be firmly locked on the brake-head lug; the element at thesame 7 N time affording a binding contact with the usual shoe lockingkey.

The objects and advantages of my invention will be fully understood andcomprehended from the detailed description of the accompanying drawings,wherein:

Figure 1 is a side elevation of a brake-head and shoe locked in placeand provided with my improved element.

Figure 2 is a front or face elevation of the brake-head with the wearreceiving element shown in Figure 1 applied to the supporting lug.

Figure 3 is a cross sectional View of the brakehead lug and wearreceiving element shown in Figures 1 and 2.

Figure 4 is a perspective view of the supporting lug portion of thebrake-head.

Figure 5 is a perspective view of the element adapted for'use on thebrake-head lug shown in Figures 1 to 4.

Figure 6 is a perspective view of a modification in the brake-head lug.

Figure 7 is a perspective view of a modified form of the wear receivingelement adapted for application to the type of lug shown in Figure 6.

My improved wear receiving element is intended for the standardbrake-heads and shoes at present in use and is especially intended forapplication to new heads, although it may be equally as well applied tobrake-heads in use which have not become excessively worn.

Brake-heads, intermediate of their ends, are provided with a pair ofspaced apart lugs as shown in Figures 1 and 2 at it) and BI, to receivethe shoe lug i2 therebetween, see Figure 1.

These three lugs have slots disposed vertically therethrough;--the slotsin the head lugs being shown at it in Figure 2;-to receive the usualshoe locking key M.

The brake-heads are usually of cast metal construction with more or lesstolerance between the lugs to permit easy application or reception ofthe shoe lug therebetween.

As the shoes are of harder metal than that of the heads, the constantvibration or up and down movement of the shoe during car operation andbrake application causes the head lug l2, especially, to soon becomeexcessively worn. As a result, the utility of the head is destroyed andreplacement of the entire head required; or formation of new lugs bywelding made necessary. This, of course, also results in car serviceloss and hence increased expense due to defective brake conditions. 1

My invention contemplates the provision of a wear receiving element l5,interposed between the lower face of the shoe lug l2 and the wearreceiving upper face of the supporting lug ll of the brake-head; namelyan element which may be made of heat treated or suitably hard steeladapted to resist the wear generally caused by the shoe lug; while atthe same time providing a firm or snug fitting relation between head andshoe 'soas to eliminate the usual play between these elements.

My improved wear receiving element l5, as disclosed in the first fivefigures of the drawings, involves a rectangular metal plate of suitablethickness and of width commensurate with the transverse depth of thehead lug l I.

This plate I 5, of proper metal or steel, is formed with downwardly andsomewhat inwardly bent ends 116, I 6 As the head lugs are formed withthe ends I! sloping outwardly toward the rear or body of the. head (seeFigures 2 and 4), the plate i5 is preferably formed with the frontlongitudi- 1 nal side l5 of length less than the other or oppositelongitudinal side; the difference in length between the two sidescorresponding to the difference in transverse dimensions between theforward or outer end of lug H and the rear or attached end thereof.

The opposite ends I! of the head lug H are each provided with a cut-inportion or groove as at E8, which are adapted to receive the downturnedends l6, It of the plate I5. These grooves I8 permit the plate to beslid onto the lug H, from front to rear.

In order to lock the plate l5 against movement toward the outer end ofthe head-lug l I, after the plate has been completely forced into place,at least one of the ends of the plate is slit in a longitudinaldirection, between the two longitudinal sides, so as to provide thetongue 19; the tongue forming portion being made of length less than theremainder of the plate so as to terminate substantially at the beginningof the bent portion the plate forming the bent end IB In order toreceive the. tongue I9, the corresponding end of the head lug II isprovided with the cut-out portion or socket 243, see Figure 4, (slopingdownwardly toward the end of the lug).

The downwardly bent ends I6, us of the plate I are intended to firmlyengage in the grooves I8, E8, to hold the plate against up-and-downmovement or play; and after the plate l5 has been firmly driven or slidonto the lug II, the tongue I9 is then driven into a declining positionas shown in Figures 3 and 5, namely into the socket 20. As the tongue I9is substantially of the same width as the socket 2B, the tongue willcontact with the side walls of the socket 2B and prevent forward slidingmovement of the plate. The brake-head is then ready to receive theshoe-lug I2; the plate I5 being provided with the key receiving openingor slot 2| adapted to register with the slot IS in the head and a slotwhich is formed in the shoe-lug l2.

In Figures 6 and '7 I illustrate a modification of the invention, withthe brake-head lug Il having its ends provided with similar grooves I8,I8, as in the previously described construction.

In Figure 6, the opposite end walls of the shoe fastening key receivingslot l3, are each provided at top with a forwardly declining socket 22,so as to provide an abutment or shoulder at 23.

The plate for this construction of head lug is shown in Figure '7; theplate 24 being practically of the same general construction as the plateI5, except that the downwardly disposed ends 25, 25 are left integralthroughout and not provided with the end tongue I9.

Plate 24 is preferably made of tempered spring steel; and at oppositeends of the shoe key receiving slot 26, partially severed portions ortongues 21, 21 are provided.

The metal is out so the tongues 21, 21 may b bent downwardly toward theshoe or forward longitudinal side of the plate in order that the freedownwardly disposed ends of the tongues 21, 21 will engage the shoulders23, 23 at opposite ends of the key slot I3 in the head lug I l Withplate 24 formed of suitable spring steel, the plate may be driven ontothe head lug Il with the ends 25, 25 seated in the lug grooves I8, I8;the ends of the tongues 21, 2! riding across the top of the head lug IIuntil the slot 25 of the plate registers with the slot I3 of theheadlug, at which time the tongues 21, 2'! will snap down into theinclining sockets 22, 22 and abut against the shoulders 23, 23. The bentends 25 and the tongues 2'! will hold the plate 24 firmly on the headlug against movement.

As is apparent, the plates I5 or 24 will not only prevent undue verticalmovement of the shoe, but will absorb all wear heretofore caused by theshoe and as a result enhance the life of the brakehead.

In order to more rigidly hold the shoe in snug relation with the head,the transverse width of the slot 2| in plate I5, and slot 26 in plate24, is preferably made less than the width of the slot I3 in the head,so that the shoe fastening key I4 will bear against one side of eitherslot 2i or 26 and not only prevent wear in the wall of the slot I3 inthe head lug, but also provide a greater binding relation with the key,as the forward wall of the plate slot, 2I or 26, is arranged to be disposed slightly rearward of the forward edge of the slot l3 in the headlug.

I have shown what I believe to be the simplest embodiments of myinvention and have described the same in terms employed for purposes ofdescription and not as terms of limitation, as modifications arepossible and may be made without, however, departing from the spirit ofmy invention.

What I claim is:

1. A brake-head wear receiving element comprising, in combination with abrake-head lug having a key receiving slot and grooved ends; a platecoextensive with the upper face of said lug and having a key receivingslot, the ends of the plate being disposed downwardly and inwardly toengage in the grooved ends of the lug.

2. A brake-head wear receiving element comprising, in combination with abrake-head lug, opposite ends whereof are grooved from front to rear; aplate having downwardly and inwardly disposed ends adapted to enter andform gripping relation with said grooved ends of the lug.

3. A brake-head wear receiving element adapted to be disposed on theupper face of a brakehead lug provided with a socket in its upper faceand comprising a plate provided with a downwardly flexible tongueadapted to engage in said socket and thereby secure the plate againstdisplacement.

at. A brake-head wear receiving element adapted to be disposed on theupper face of a brakehead lug and comprising a plate having downwardlydisposed ends adapted to form gripping relation with opposite ends ofthe lug and having a downwardly flexible tongue adapted to providelocking engagement between the lower face of the plate and the upperface of the head lug.

5. A brake-head wear receiving element comprising a plate adapted to bedisposed on the upper face of a brake-head lug and provided withdownwardly and inwardly disposed ends and a downwardly flexible tongueintermediate of the ends of the plate.

6. A brake-head wear receiving element comprising a flat plate adaptedto be disposed on the upper face of a brake-head lug provided with asocket in the upper face, said plate being provided with a bendableportion adapted to engage in the lug socket so as to prevent movement ofthe plate toward the outer end of the head lug.

'7. A brake-head wear receiving element adapted to be disposed on theupper face of a brakehead lug, comprising a fiat plate provided withdownwardly disposed ends, the plate adjacent one of the ends beinglongitudinally slit to provide a bendable tongue.

8. A brake-head wear receiving element adapted to be disposed on theupper face of a brakehead lug, comprising a flat plate provided with abrake-shoe key receiving slot and a portion of the plate at the end ofthe slot partially severed to provide a downwardly flexible andforwardly presented tongue.

9. A brake-head wear receiving element adapted to be disposed on theupperface of abrake-head lug, comprising a flat plate provided with a.brake shoe key receiving slot, with portions of the plate at oppositeends of the slot provided with downwardly flexible and forwardlypresented tongues.

10. A brake-head wear receiving element adapted to be disposed on theupper face of a brake-head lug, comprising a flat plate provided with abrake shoe key receiving slot and with a downwardly flexible andforwardly presented portion, the ends of the plate being bent downwardlyin inwardly inclining directions.

ll, A brake-head wear receiving element com prising, in combination witha forwardly tapering break-head lug whose opposite ends are providedwith grooves disposed from front to rear and the upper face of the lugprovidedwitharecessformed to provide a vertical shoulder at the forwardside of the recess; a flat plate having downwardly bent ends convergingtoward the forward longitudinal side of the plate and adapted to engagein the grooves of the head lug, a portion of the plate being partiallysevered to provide a bendable tongue adapted to enter the lug recess andabut against said vertical shoulder.

12. A brake-head wear receiving element oomprising, in combination witha forwardly tapering brake-head lug whose opposite side walls are eachprovided with a groove disposed from front to rear and the upper face atone end of the lug provided with a declining recess; a flat plate whoseopposite longitudinal sides are of unequal length and the ends bentdownwardly and converging inwardly toward the front longitudinal side ofthe plate, said ends being adapted to slide lengthwise of the grooves inthe ends of the head lug, while a portion of the plate is partiallysevgage in the recess of the head lug.

13. A brake-head wear receiving element comprising, in combination witha brake-head lug tapering forwardly and withthe opposite sidewalls eachprovided with a groove extending from front to rear of the lug, the lughaving a key receiving opening therethrough, with the end walls of theopening on the upper face of the lug having recesses sloping downwardlytoward the front; aflat plate whose opposite longitudinal sides are ofunequal length and the ends of the plate bent downwardly and converginginwardly toward the front side of the plate, said ends being adapted toslide lengthwise of the grooves in the lug sides, said plate having akey receiving opening adapted to register with the opening in the lugand portions of the plate at opposite ends of its opening provided withtongues sloping downwardly toward the front of the plate and adapted toengage in the lug recesses.

VICTOR H. HARBERT.

